Thrashing machine



Sept. "i6", m29. J. JAAKKOLA e THRASHING MACHINE Filed May 9, 1925 5 Sheets-Sheet l Inven/r fo/aanwas' Jaa/fiala Sept. 10, 1929. J. JAAKKOLA 1,728,124

THRASHING MACHINE Filed May 9, 1925 5 sheets-sheet 2 fnl/Mr Johannes Jaakkala Patented Sept. 10, 1929.`

UNITED STATES JOHANNES JAAKKOLA, OF HARJ'AVALTA, SUOIVJIII3`INLAI\TD.y y

THRASHING MACHINE.

Application led May 9,

The invention has for its object a thrashing machine, by means of which through a practical combination of the moving parts and through special arrangements a complete and quick separation and cleaning of the grain is obtained.

The attached drawings show a way of carrying out the idea of the invention.

Fig. 1 shows the thrashing machine 1n section.

Fig. 2 is a side view of the machine. Fig. 3 is an end view of the machine. Fig. 4 shows the machine in combination with a special carrier for feeding in the sheaves.

The crank-shaft 1 of the straw shaker sets in motion the straw shaker 2, the incline 3 and in combination with it a straw sieve 3', the sieve box 5 with the sieves 6 and 7 and finally the inclines 10 and 9, which latter incline 9 may be furnished with a sieve at 8.

The straw shaker 2, which is composed of two or more units, gets its motion from the crankshaft in the usual way. lIhe other parts are set iIi motion as follows; to one or every other unit of the straw shaker, preferably near the bearings of the crankshaft, isy rigidly attached one end of a pitman 11, the other end of which being rigidly attached to the incline 3. The combination thus obtained is made firmer by means of a brace l2. The pitman is furnished between the brace 12 and the incline 3 with a somewhat flexible part 13. The incline 3 is supported in the usual way by the exible hinges 14 and 15, and will thus be free to move with said straw shaker.

To one or more-units of the straw shaker, but different from the units just mentioned, a pitman is rigidly attached, preferably to the end of the shaker. The pitman is furnished with an extension 17, the end of which is rigidly attached to the incline 10 in the sieve box. The sieve box is supported in the usual way by the flexible hangers 18 and 19.

The machine is furnished with a toothed cylinder 20 coacting with concave 21 which extends further than usual around the cyl- 1925. serialv No. 29,196.

inder in such a way as to enable the feeding to take place obliquely from above. 'The outside of the concave is furnished with a canvas 22 or vsomething similar, sopas to 'enable the grain separator to be used as a beater 55 and kif necessary as a hay-seed rubber kas well. The canvas 22 is attached at its upper end. by means of hooks 24 to a guide 23 and positioned on the outside of the concave and over the concave bars. the canvas is adjustable in such a way, that its lower end, which reels upon a roller, may be iixed at will by means of a thumb nut y25 and a clamping yplate 26.` The screw of the f thumb nut 25 consists of a stemattached to 65 a'wooden block 27. `The block mayv be attached at will between different bars ofthe concaves. l n

A grain separator, when used as a beater, s will deliver Lthe grain mixed with'a certain 70 amount of dust and cha. The residual impurities may be completely removed in the transporting and sizing arrangements of the machine. On the shaft extension of the cylinderthere is mounted a fan 28k encased in 75 a `drum 29. p. The drum is furnished with two air chutes. The chute 30, which may be closed by means of a door 31, leads directly to the screen boxy 32. kThe chute 33 is ,bent downward and is openk at the knee 31 sup- 80 portedby a pan like member 55,. n The grain, which has passed through the sieves from thesievebox 5, drops into this knee through the duct 34. The blast takes the grain along, L delivering it into the screen box S and tossing it against the inclines y35 and 36 therein, whence it'lands on the sieve 37 alsoiin` said screen box S. The y,Sieve ygets its motion for instance byy meansy of an eccentric or, as ff suggested in dotted line on Fig. 2, by means of a rod 38 attachedto the sieve 37 through a bracket 38 and likewise connected to the movable incline 3 shown in Fig. 1. The blast through the chute 30 helps in sizing and cleaning of the grain. The chute 30 95 opens below the chute 33 and the blast through the chute 30 is directed through the screen 37. The dust and other impurities are blown out through the sieve 39 comprisf ing the cover of the screen box. The heavier The length of 60 i grain is discharged through the hopper 40 from compartment 40, the lighter grain being discharged through the hopper 41 from compartment 41.

A suitable carrier is shown on Fig. 4. An endless chain or rope (44) or such, which gets its motion from the moving elements of the machine and moves over pulleys 42 and 43, transports the sheaves into the feeder of the machine. Itis to be noted that the carrier can be folded. The legs 45 are hinged on pins 46. The frame 47 folds down on a hinge 48. The frames and legs are thus folded along the end of the thrashing machine. The side wings 49 fold over the end-plate 51 onhinges 50. The endplate 51 in turn folds down on hinges 52.

I claim: Y Y v l. In a thrashing machine, `a toothed grain thrashingy and feeding cylinder, a concave extending about the greater portion of said cylinder, and an adjustable canvas arranged about the outer side of said concave.

2. In a thrashing machine, a toothed grain thrashing and feeding cylinder, va concave extending about the greater portion of said cylinder, and a removable adjustable canvas arranged about the outer sides of said concave.

'3. In a thrashing machine, a toothed gra-in thrashing and feeding cylinder, a concave extending about the greater portion of said.

cylinder, a canvas arranged upon the outer side of said concave and having one end detachably secured to the upper portion of the same, and movable means carrying the free end of said canvas whereby the latter may be adjusted over said concave.

4. In a thrashing machine, a toothed grain thrashing and feeding cylinder, a concave having a pluralityof spaced parallel bars extending about the greater portion of said cylinder, a canvas arranged upon the outer side of said concave and having one end detachably secured to the upper portion of the same, a roller for Winding the free end of the canvas, and a movable block "carrying said roller, said block being insertable between any ttvo consecutive parallel bars of said concave Vwhereby the canvas may be adjusted over said concave.

In witness whereof I have hereunto set my hand.

JOHANNES JAAKKOLA. 

